Fuse 18 keeps blowing

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liam_0404
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Fuse 18 keeps blowing

Post by liam_0404 » Sun Mar 31, 2019 6:24 pm

Hello all,
Got the Scirocco out of storage today and noticed the handbrake indicator light on the dash wasn’t illuminated when the handbrake was up.
Checked fuse 18 and it had gone, so replaced it, which it then immediately popped again.
Had a google and it says fuse 18 is for handbrake warning light, dual horn, coolant level (or something like that)
So disconnected all of those, ignition turned on and once again pop, fuse blew. Also tried removing relays but still keeps blowing fuses.
Pulling my hair out now as the only other thing I think it can be is the actual fuse box (path between fuse 18 and the back of fuse box)
Any ideas as I have MOT next week and need to get the handbrake warning light working :|
Thanks.


'88 Scirocco 1.6 8v GT
‘94 Golf 2.8 12v VR6
'02 Grand Cherokee Limited 4.0 I6
'07 Golf GTI 2.0T

mark1gls
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Re: Fuse 18 keeps blowing

Post by mark1gls » Sun Mar 31, 2019 9:09 pm

Common problem of coolant level sensor wire acting like a wick and drawing coolant down the wire into the fuse box, have a look behind the fuse book connection to see if it's rusty.
Adding in a loop in the wire before the fuse box can help with this problem.
Could be the reason why the fuse keeps blowing?


Mk1 78 Scirocco GLS 1.6 FR, weekend toy.
Mk1 88 Golf GTi cabriolet 1.8 DX. Daily drive.
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liam_0404
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Re: Fuse 18 keeps blowing

Post by liam_0404 » Mon Apr 01, 2019 10:31 am

mark1gls wrote:
Sun Mar 31, 2019 9:09 pm
Common problem of coolant level sensor wire acting like a wick and drawing coolant down the wire into the fuse box, have a look behind the fuse book connection to see if it's rusty.
Adding in a loop in the wire before the fuse box can help with this problem.
Could be the reason why the fuse keeps blowing?
Any idea where or what this runs to at the FuseBox? (What relay etc.) There was a bit of brown on one of the relays (wasn’t numbered) which was randomly clicking like mad at one point, I’ll have a look and see.


'88 Scirocco 1.6 8v GT
‘94 Golf 2.8 12v VR6
'02 Grand Cherokee Limited 4.0 I6
'07 Golf GTI 2.0T

GT_II
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Re: Fuse 18 keeps blowing

Post by GT_II » Mon Apr 01, 2019 11:20 pm

The handbrake warning light is not tested in the MOT, though I guess a meticulous tester might log it as an advisory. However, if the horns are not working either, that would be an MOT failure.



mark1gls
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Re: Fuse 18 keeps blowing

Post by mark1gls » Tue Apr 02, 2019 9:19 am

Info on fusebox
https://vwgolfmk1.org.uk/forum/index.ph ... g-layout_2

Try disconnection the coolant level sensor on the expansion tank.
I think coolant level sensor is plugged into Block D pin 7?

If no better then try unpluging the other items, eg horn to try and eliminate what's causing the fuse to blow...


Mk1 78 Scirocco GLS 1.6 FR, weekend toy.
Mk1 88 Golf GTi cabriolet 1.8 DX. Daily drive.
Membership No. 323

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C 20 CCO
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Re: Fuse 18 keeps blowing

Post by C 20 CCO » Fri May 31, 2019 1:37 pm

Any news pal, did you get it sorted?


kind regards,

Dave.

To be old and wise......
You must first be young and stupid!

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james butler
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Re: Fuse 18 keeps blowing

Post by james butler » Fri May 31, 2019 9:37 pm

blimey i had this problem not long back
it was the heater wire to the front of my carb gone to ground causing a short circuit.
annoyingly no manual tells you this fuse is connected to al lthe carb control wires :diablo:


I dont mind project cars but I HATE SANDING!!!